Natural Hazards Management Plan - Energy Queensland - Energex
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Energy Queensland
Natural Hazards
Management Plan
Inc. Summer Preparedness 2021/22
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Joint Reference Document between Energex and Ergon Energy
Energex Limited ABN 40 078 849 055 Ergon Energy Corporation Limited ABN 50 087 646 062
This Document is Uncontrolled When Printed
Disclaimer
Ergon Energy Network and Energex’s Natural Hazards Management Plan is prepared and made available solely for
information purposes.
Ergon Energy Network and Energex make no representations, express or implied, as to the completeness or accuracy
of the information and data contained in the report and accepts no liability arising for any loss resulting from the use
of any information and data or reliance placed on it. Nothing in this report should be taken as a recommendation in
respect of any possible investment. It does not purport to contain all of the information and contains certain
predictions, estimates and statements that reflect various assumptions. Those assumptions may or may not prove
correct and may change over time. The information contained in this plan is subject to annual review.
Persons reading this document acknowledge and accept that Ergon Energy Network and Energex and/or its
employees, agents and consultants shall have no liability (including liability to any person by reason of negligence or
negligent misstatement) for any statements, opinions, information or matter (expressed or implied) arising out of,
contained in or derived from, or for any omissions from, the information contained in this report.
Availability of the Natural Hazards Management Plan
This plan is available on the Ergon Energy and Energex websites www.energex.com.au and www.ergon.com.au
Version Date Description
1.0 October 2021 Natural Hazards Management plan to
replace EQL Summer Preparedness Plan
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Joint Reference Document between Energex and Ergon Energy
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Executive Summary
Each year Ergon Energy Network and Energex, as part of the Energy Queensland group, undertake diligent
preparation and planning activities to ensure we are prepared for the potential impact of the numerous natural
hazards that occur in Queensland each year.
As the climate, our environment and our customer needs change, we are presented with a myriad of challenges. In
order to minimise impact to our customers and community we need to ensure our network is resilient, able to
withstand the impact of natural hazards and that our response capability is efficient and effective. This Natural
Hazards Management Plan has been developed on behalf of both Ergon Energy Network and Energex. It details our
planning and preparation activities critical to providing Queensland with a reliable network where disruptions are
minimised during natural hazard events. When disruptions do occur, we will ensure we respond as quickly as
possible to restore supply safely and maintain our vision to Energise Queensland Communities.
This plan supersedes Energy Queensland’s Summer Preparedness Plans from previous years, acknowledging the
changing climate, an expanded view of natural hazards and the additional preparation, planning and response now
required outside the typical Summer period. It has been developed to assist both internal and external stakeholders
to understand the arrangements in place.
ROD DUKE PAUL JORDON PETER PRICE
Chief Executive Officer Executive General Manager Executive General Manager
Operations Engineering
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Joint Reference Document between Energex and Ergon Energy
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6. Preparedness ......................................................... 13
Contents
6.1. Preparing the Network .................................. 13
Executive Summary .......................................................... 3
1. Introduction ............................................................. 6 6.2. Contingency Plans.......................................... 13
6.2.1. System Normal........................................... 13
2. Context ..................................................................... 6
2.1. Climate Change ................................................ 6 6.2.2. Safety Net .................................................. 14
6.3. Under Frequency Load Shedding................... 14
3. Our Network ............................................................ 8
6.4. Demand Management ................................... 14
Part A – Governance........................................................ 9
4. Framework ............................................................... 9 6.5. Critical Community Assets ............................. 15
6.6. Emergency Mobile Generation ...................... 15
4.1. Review .............................................................. 9
4.2. Risk Management ............................................ 9 6.7. Seasonal Outlooks and Forecasts .................. 16
6.8. Training and Exercise Management .............. 16
4.3. Committees ...................................................... 9
4.4. Roles and Responsibilities ................................ 9 6.9. Preparing Customers ..................................... 16
7. Response................................................................ 17
4.5. Continuous Improvement ................................ 9
7.1. Intelligence Systems ...................................... 17
4.6. Memoranda of Understanding ......................10
4.7. Distribution Network Service Providers .........10 7.1.1. Internal ...................................................... 17
7.1.2. External ...................................................... 17
4.7.1. Queensland Fire and Emergency Services
10 7.2. Weather Forecasting ..................................... 17
4.7.2. Queensland Fire and Emergency Services 7.3. Hazard Specific Alerts .................................... 17
and Powerlink ........................................................10 7.4. Emergency Response Levels .......................... 17
4.8. Interagency Co-operation ..............................10 7.5. Priority Assets and Restoration Approach ..... 18
4.9. Seasonal Exposure to Hazards .......................10 7.6. Isolation for Safety......................................... 18
PART B – Prevention, Preparedness, Response and 8. Recovery ................................................................ 19
Recovery ........................................................................11
9. Community Engagement ....................................... 19
5. Prevention ..............................................................11
9.1. Event Community Outreach .......................... 19
5.1. Mitigation and Resilience Activities ...............11
9.2. Online Event Storm Centre ............................ 19
5.2. Inspection and Maintenance Programs .........11
10. Safety ................................................................. 19
5.2.1. Assets .....................................................11
10.1. Safety Programs ......................................... 20
5.2.2. Vegetation ..............................................11
Part C – Natural Hazard Profiles and Sub Plans ........... 21
5.2.3. Field Mobile Computing .........................12
Section 1 - Storms ...................................................... 21
5.3. Asset Design ...................................................12
Section 2 – Tropical Cyclone ...................................... 23
5.4. Feeder Performance Assessments .................12
Section 3 – Bushfire ................................................... 24
5.5. Asset Improvements Initiatives .....................12
Section 4 – Heatwave ................................................ 28
5.6. Capital Investment Programs .........................12
Section 5 – Flood – Riverine and Coastal................... 30
5.7. Private Asset Ownership ................................13
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Section 6 – Earthquake ..............................................32
Section 7 – Tsunami ...................................................33
Section 8 – Landslide..................................................34
Section 9 – Pandemic .................................................35
Section 10 - Space Weather .......................................36
Part D - Definitions, Abbreviations and Acronyms ......37
11. References .........................................................39
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Joint Reference Document between Energex and Ergon Energy
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This Document is Uncontrolled When Printed1. Introduction acidic seas. Climate change is influencing all extreme
weather events in Australia as these events are now
Our climate is changing and presenting numerous
occurring in an atmosphere that is warmer and wetter
challenges for us and our communities. The traditional
than it was in the 1950s’ 1.
focus on the Summer Storm season has shifted. Natural
hazard emergency events are occurring with increased The Qld State Natural Hazards Risk Assessment 2017
frequency and severity across the whole calendar year. comprises macro-level hazard-specific risk information.
The 2017 assessment focused on the seven most
Due to its expansive distances and varying climates from
frequent and significant natural hazards and it is
tropical, subtropical, hot arid and warm temperature
expected future assessments will consider the impacts
climates, Queensland is exposed to numerous natural
and influences of climate change and variability.
hazards.
Like other disaster management groups and response
As the primary distribution network service providers for
agencies, EQL must reassess the applicability of these
all of Queensland, Ergon Energy Network and Energex
hazards on our operations and integrate into all aspects
are responsible for maintaining the delivery of electricity
of Prevention, Preparedness, Response and Recovery.
to Queensland communities in all climates. Its network,
depots and offices are exposed to these changing Climate change is also reinforced in the recently
environmental conditions. released Queensland Bushfire Plan 2020 outlining the
arrangements to enable Queensland’s management of
This Natural Hazards Management Plan has been
bushfire hazard. Future challenges include:
developed on behalf of both Ergon Energy Network and
Energex. Ergon Energy Network and Energex reviews • Accelerating changes in weather, resulting from
natural hazards regularly, identifying possible risks to climate change and the subsequent changes to
our infrastructure, and ensuring we are ready to
fuels, means that bushfire is becoming one of
respond and support the community in a safe and timely
the primary natural risk drivers in Queensland
manner (so far as is reasonably practical). When
• Queensland is becoming hotter and drier, with a
disruptions do occur, we are prepared to respond as
quickly as possible to restore supply safely and maintain growing number of days per year likely to reach
our vision to Energise Queensland Communities. or exceed very high fire danger
• Bushfire seasons are starting earlier, resulting in
2. Context a longer season
• The frequency, duration and severity of
2.1. Climate Change heatwaves and droughts is projected to increase
Our environment and climate are changing, and we are significantly’. 2
experiencing a shift in the seasons, severity of hazards
and subsequent impacts of events on the electricity Due to the expanse of the state, varying geography and
network. current climate conditions, the impact of climate change
is expected to vary resulting in the uneven distribution
The QLD State Natural Disaster Risk Assessment 2017 of climate projections 3
indicates ‘the State will experience higher temperatures,
hotter and more frequent hot days, harsher fire EQL acknowledges and aligns with the Queensland State
weather, fewer frosts, reduced rainfall in the south-east, Government Pathways to a climate resilient Queensland,
more intense downpours, less frequent but more Queensland Climate Adaption Strategy 2017-2030 and
intense tropical cyclones in the north, rising sea level, has developed an internal Low Carbon Future Statement
more frequent sea level extremes, warmer and more
1
Queensland State Natural Disaster Risk Assessment 2017
3
https://www.disaster.qld.gov.au/cdmp/Documents/Adaptation-
2Queensland Bushfire Plan 2020 Plan/Climate-Change-Factsheet.pdf
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This Document is Uncontrolled When Printedand Environmental Sustainability and Cultural Heritage
Policy.
These documents will guide our development and future
focus on climate change, network resilience and
reducing the impact of natural hazards.
Image 1- The Disaster Management Activities Calendar 4
4
Queensland State Disaster Management Plan
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This Document is Uncontrolled When Printed3. Our Network
Ergon Energy Network and Energex operate in a vast
area covering 1.7 million square kilometres. This consists
of approximately 207,000 km of overhead and
underground high voltage and low voltage distribution
power lines and 1.7 million poles.
The high voltage network operates at a variety of
voltages ranging from 220kV, 132kV, 110kV, 66kV, 33kV,
22kV, 19.1kV, 12.7kV, and 11kV. The low voltage
network is reticulated at 415/240/230 Volts.
The network also includes 33 isolated power stations, 72
bulk supply points and 571 zone substations.
Ergon Energy Network and Energex are responsible for
the provision of electricity from the NSW and NT border
up to the Torres Strait. It has 124 depots located across
17 operational areas to provide fault response, and
planning and maintenance activities for electrical related
emergencies.
Image – Ergon Energy Network and Energex Operational
Regions and Areas
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This Document is Uncontrolled When PrintedPart A – Governance Hazard Risk Assessment 2017, severe storms, cyclone,
bushfire, heatwave, flood (riverine and coastal),
earthquake and landslide are considered, assessed and
4. Framework managed via the Energy Queensland electronic
EQL applies an Organisational Resilience Strategy, and Governance Risk Compliance (GRC) electronic tool.
an Emergency and Business Disruption Framework to Pandemic has also been considered under the banner of
assist the organisation in the management of crisis, natural hazards.
emergencies and business continuity events. This
framework is comprised of a suite of documents 4.3. Committees
designed to guide the EQL Group in their Prevention, A Summer Preparedness Working group operates to
Preparedness, Response and Recovery (PPRR) for ensure our business divisions have conducted
emergencies including natural hazard events. preparations throughout the year and in the lead up to
the summer storm season. This assures a safe and
These documents are structured hierarchically with an robust network, sound emergency response procedures
Organisational Resilience Strategy, this Natural Hazards and safety awareness to our employees and the broader
Management Plan, and Emergency Management Plans community.
and various supporting response documents to be used
when planning for and responding to natural hazards There are also hazard specific committees and technical
and other emergencies. advisory groups covering bushfire, flood, heatwave and
pandemic hazards.
EQL has modelled its Emergency and Business Disruption
Framework on the Queensland Government’s 4.4. Roles and Responsibilities
Emergency Risk Management Framework. EQL has A dedicated organisational structure has been
structured its framework on the principles of the developed for organisational oversight and emergency
Australasian Interservice Incident Management System management teams. Charters and role statement
(AIIMS) to align EQL's framework with that employed by handbooks outline each role and the associated
the emergency services and other response agencies responsibilities required for an emergency response.
and organisations.
4.5. Continuous Improvement
4.1. Review To ensure EQL continues to maintain a current and
This plan is reviewed annually to ensure currency and effective emergency management framework to safely
application of learnings from previous events and to support the community, EQL conduct regular assurance
identify improvement opportunities. checks of its framework, procedures, processes and
work practices.
4.2. Risk Management
Natural hazard risks are managed in accordance with the EQL conducts hazard specific reviews to identify the risk
Energy Queensland Risk Management Policy, Framework and exposure to business continuity, its functions and
and Process. The Risk Management Process aligns with assets and the potential effect on customers and the
the internationally recognised Standard AS/NZ ISO community.
31000:2018 Risk Management – Principles and
Following the activation of escalated emergency
Guidelines. Management of risk is critical to effective
response functions, debriefs are conducted to identify
asset management and is integral to the ISO 55000 Asset
both success and improvement opportunities for
Management suite of Standards. EQL regularly reviews
application in future events.
inherent and emerging risks to and as a result of
operations. In line with the Queensland State Natural
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This Document is Uncontrolled When Printed4.6. Memoranda of Understanding issues and priorities to ensure the optimum state
response.
EQL currently maintains a number of Memoranda of
Understanding (MoU) with other Distribution entities 4.7. Interagency Co-operation
and supporting bodies to assist with its ability to Ergon Energy Network and Energex have responsibilities
prepare, plan for and respond to emergency events. under the Disaster Management Act (2003) to ensure
adequate liaison occurs with emergency services. The
4.6.1. Distribution Network Service Queensland Disaster Management Arrangements
Providers (QDMA) outlines the various committees and
governance across the state for stakeholders and inter-
MoU’s have been developed with other Distribution
agency collaboration and co-operation.
Network Service Providers (DNSP’s) including Essential
Energy, Endeavour Energy, Ausgrid and Power and EQL maintains representation on the following groups to
Water Corporation outlining the key support principles ensure appropriate collaboration and interagency
and arrangements between the companies, including information sharing with emergency services. These
additional resources to assist with large scale responses. committees are convened throughout the year (both
As part of the annual preparation, a review of these during and outside emergency events):
MoU’s is conducted. Arrangements are also in place for • Queensland Disaster Management
assistance from approved contractors and suppliers. Committee (QDMC)
• State Disaster Co-ordination Group (SDCG)
4.6.2. Queensland Fire and Emergency • District Disaster Management Groups (DDMG)
Services • Local Disaster Management Groups (LDMG)
A MoU has been established with Queensland Fire and • State Inter-Departmental Committee on
Emergency Services (QFES) for data sharing including Bushfire (SIDC)
licensed data relating to all Hazards/Incident events, • Regional Inter-Departmental Committee on
risks and operational responses. Bushfire (RIDC).
This data includes planning and operational data within Field Operational Managers also establish and maintain
the Queensland Emergency Management Risk relationships with local emergency services leaders
Framework (QERMF) tool within the Queensland through disaster management groups and regular
Disaster Management Arrangements (QDMA). The data stakeholder interactions. These ensure the ability to
layers from the QDMA sharing group are used by Ergon work co-operatively during emergencies as well as
Energy Network and Energex for planning and support community resilience and continuity.
operational purposes.
The Ergon Energy Network and Energex Operational
4.6.3. Queensland Fire and Emergency Control Centres also maintain protocols for direct
Services and Powerlink contact with QFES FIRECOM ensuring rapid response to
incidents.
A MoU is maintained with QFES and Powerlink (PLQ) and
includes protocols for joint response. It outlines the
approaches relating to bushfires, emergency contacts, 4.8. Seasonal Exposure to Hazards
and communication protocols for significant incidents As the seasons change, EQL adjusts its preparations and
and emergency events where the assets of the parties response plans as necessary to ensure readiness. The
are impacted. During a significant network emergency, expansive distances of Queensland also mean that the
each emergency management team considers common exposure to the numerous hazards is different for each
part of the state and therefore to the electricity
network, depots and customers.
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This Document is Uncontrolled When Printedthe protection of plant and equipment and
public and staff safety
PART B – Prevention, Preparedness, • Inspection of water way crossings, underground
pillars and a range of other network assets
Response and Recovery • Use of thermal surveying inspections of bulk,
zone and distribution substation sites and plant
5. Prevention • Periodic Light Detection and Ranging (LiDAR)
inspections on feeders in accordance with our
5.1. Mitigation and Resilience Activities inspection programming to identify vegetation
With a large overhead electricity network traversing and conductor clearance issues. Issues are then
long distances through densely vegetated areas in rural prioritised to ensure immediate actions where
Queensland, there is a high exposure to the elements required or are programmed into our regular
and severe weather events can have a significant impact maintenance programs.
on supply reliability. In order to minimise these impacts, • In selected high rainfall areas, detailed pole top
we have identified and implemented critical inspections are also carried out on selected
maintenance activities, including a vegetation feeders on a four-year cycle (mid cycle from the
management and cyclical maintenance program. main asset inspection program).
EQL also has a range of measures in place to protect its 5.2.2. Vegetation
depots and offices that may be impacted by these Ergon Energy Network and Energex actively seek to
natural hazards as they support the network response minimise the risk of vegetation around the overhead
effort of our teams in the field. assets, and includes consideration of public safety,
network reliability, quality of supply, customer service
5.2. Inspection and Maintenance Programs and network operating costs. This includes from the
5.2.1. Assets impact of natural hazards.
Ergon Energy Network and Energex operate an ongoing
The approaches used to manage vegetation include:
asset inspection and maintenance program on the
network which complies with The Electrical Safety Act • A cyclic program, to treat or cut vegetation on
and the Code of Practice - Works. all overhead line and high-risk proximity tree
routes with cycle times dependent upon local
Our aim is to provide a resilient and safe network
conditions, urban density and growth rates
through a detailed annual program of work to improve,
develop, maintain and operate the network. Included as • A warranty period after cycle cut during which
part of this inspection program is the: time all zones are assessed to ensure that
vegetation will remain typically clear for the
• Routine inspections of substation equipment are whole of the assigned treatment cycle
completed dependant on equipment types, • Reactive treatment activities to address
classification and condition localised instances where vegetation is found to
• Routine inspections of overhead lines and poles be within clearance requirements. If a member
are completed through ground-based condition of the public or employee identifies individual
assessments. vegetation sites which are close or make contact
• Testing of overhead high and low voltage with the mains, Ergon Energy Network and
earthing systems to ensure their effectiveness in Energex will assess and if necessary, rapidly
deploy a crew to re-establish safe clearances
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This Document is Uncontrolled When Printed• Regular audits of activities for completion and Interruption Duration Index (SAIDI) performance over
quality of works providing recommendations that time against the Minimum Service Standards (MSS).
and actions for rectification.
5.5. Asset Improvements Initiatives
5.2.3. Field Mobile Computing In addition to the feeder specific reliability initiatives,
Ergon Energy Network and Energex have field mobile
Ergon Energy Network and Energex have a range of
computing systems that are used in the routine
inspection of poles and line components. The system asset refurbishment programs aimed at achieving the
enables asset inspectors to issue work, locate poles, optimal service life from assets, whilst planning
validate the pole details, record any inspection replacement of the assets prior to their “end of life”.
measurements or data required, confirm asset defect These programs help to improve resilience, safety and
work orders and raise new defect work orders. This reliability across the entire network.
information is retrieved and integrated into corporate
systems for future planning and rectification works Examples of the range of initiatives undertaken by Ergon
required. Energy Network and Energex include, but are not limited
to:
5.3. Asset Design • Line refurbishment programs– such as
Ergon Energy Network and Energex design our electrical replacement of aged (or corroded) conductor,
network to maximise reliability, safety, performance and installation of insulated/covered conductors
shareholder value over the long term (commensurate
with the life expectancy of network assets) whilst • Lines defect remediation – repair and
meeting community expectations for environmental remediation of defects identified through asset
impact and regulatory expectations, so far as is inspection, such as cross-arms, insulators tie
reasonably practical. wires etc
The design and construction of new power lines • Programs of condemned pole replacement
considers bushfire risk mitigation and flood risk
mitigation opportunities. Identification of high bushfire • Customer Service line replacement programs
risk areas using Geographic Information Systems assists
• Trialling and development of a range of pole
better planning and reduces the risk to assets through
improved route selection and placement. materials/technologies (such as composite fibre)
along with the ongoing use of concrete and steel
Standards have been developed to ensure optimum rebutted poles where appropriate
design, configuration and construction quality across the
network. All EQL’s assets and other structures are • Ongoing research and development and trials of
designed to comply with relevant standards. fire-resistant coatings (fireproof paint and
fireproof wraps) for wood poles in fire prone
5.4. Feeder Performance Assessments areas.
Ergon Energy Network and Energex are ensuring that the
investment in the Worst Performing Feeder 5.6. Capital Investment Programs
Improvement program is prudently spread across We are required to ensure adequate system capacity
different feeders and regions. Ergon Energy Network and maintain an acceptable customer service level
distribution feeders are ranked (status assigned) under the respective Distribution Authority. Capital
according to their three -year average System Average investment programs have been developed and
implemented to achieve the outcomes end users of
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This Document is Uncontrolled When Printedelectricity seek with regard to the safety, quality and (October). These activities include planning and
reliability of electricity services. The capital investment documentation updates, training in the Emergency and
programs are based on the following five key criteria: Business Disruption framework, familiarisation of
emergency management plans, conducting emergency
• Safety Net Targets for restoration of supply
response exercises, emergency response refresher
following a contingency event
training for all field personnel and providing online
• Minimum Service Standards (MSS) that set a training to all EQL Group employees involved in
level of required reliability emergency management.
• Feeder improvement programs to improve
reliability on constrained 11kV feeders and 6.1. Preparing the Network
• Regulatory requirements as per the National The specific activities undertaken to prepare the
Electricity Rules (NER). network and improve resilience against natural hazards
• Asset age and condition to improve safety include network capacity and security improvement
requirements. programs, safety net requirements, plant emergency
rating information, strategic spare components, peak
load monitoring, temporary load support, demand
5.7. Private Asset Ownership management and inspection programs. Contingency
The owners of Private Overhead Electric Lines and poles plans are developed to ensure security and encompass a
are obliged to maintain them in a safe condition. Poorly number of aspects:
maintained private lines and poles have the potential to
pose significant electrical risk or to start bushfires. • Network contingency and load transfer plans to
Ergon Energy Network and Energex are not responsible cater for single contingencies
for the condition or maintenance of privately owned • Strategies for spares and replacement of major
Electric lines within Queensland, but currently perform a plant such as power transformers
visual inspection of Private Overhead Electric Lines and • Availability of mobile generators for deployment
the first pole on the private property, advising the
to provide an emergency supply in situations
customer of defects noted. Ergon Energy
where practicable
Network, Energex and the Electrical Safety Office
• Availability of two 33/11kV mobile substations in
provide safety and maintenance advice on privately
owned electric lines. the South East, two 10MVA 66/33/22/11kV
mobile substations (NOMADs) in the Southern
The owners of private overhead electric lines are region and one NOMAD in the Northern region
responsible for keeping their assets free from for deployment to provide an emergency supply
obstruction of vegetation and should ensure that trees where practicable noting that they can be
planted in the vicinity of powerlines are appropriate low moved across regions and
growing species. Ergon Energy Network is responsible • Application of available demand management
for the inspection of private property poles in New options.
South Wales that are connected to the Ergon Energy
Network, in accordance with IPART requirements. 6.2. Contingency Plans
6.2.1. System Normal
6. Preparedness Each year, the entire network is reviewed to ensure that
Dedicated activities commence annually in May and all substations and feeders can supply a 10 PoE (10%
continue throughout the year to prepare for the Probability of Exceedance) forecast peak load under
commencement of the bushfire season (typically August) system normal conditions i.e. against the Normal Cyclic
and into the summer storm and cyclone period Capacity (NCC). A process has been implemented to
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This Document is Uncontrolled When Printedmonitor loads during the summer peak period so that as 6.3. Under Frequency Load Shedding
hot weather develops, emerging “hot spots” where Under Frequency Load Shedding (UFLS) is an automatic
demand growth may have exceeded the previous annual load shedding process that happens almost
forecasts are identified. In these cases, corrective action instantaneously to protect the power system if there is a
to avoid an overload is taken well before a capacity major unplanned outage in the National Electricity
constraint occurs. Market. An event such as the sudden failure of a major
generator or transmission line resulting in available
6.2.2. Safety Net
electricity supply falling below customer demand results
Network contingency plans detail the load transfer and
in a reduction in system frequency and potential
load management options available to restore supply
instability.
following a single contingency event affecting bulk
supply substations, zone substations and sub- To prevent this, the electricity grid is equipped with
transmission feeders. In cases where existing capacity or strategically located Under Frequency Relays. The relays
load transfer capability is not sufficient to enable supply are grouped into blocks of varying customer types to
to be restored following a single contingency, more minimise impact. This automatic load shedding process
comprehensive plans are developed depending on the is developed to minimise impact on critical loads.
tolerability of the risk level identified.
The Australian Energy Market Operator (AEMO) requires
Restoration targets are defined in Schedule 4 of Ergon Energy Queensland to have 60% of its loads available for
Energy’s Distribution Authority and Schedule 3 of Under Frequency Load Shedding. We work closely with
Energex’s Distribution Authority “…to the extent Powerlink to review the UFLS blocks. The increasing level
reasonably practicable”. This acknowledges that of roof top solar generation is also changing the load on
regardless of level of preparation, there will always be distribution feeders available for shedding if it is
circumstances where it is impossible to meet the required during the day. We have also confirmed a
restoration targets at the time of an event (for example, continuous review of load shedding schedules to better
if it is unsafe to work on a line due to ongoing storm understand where significant rooftop solar generation is
activity), though these should be rare. connected on the distribution network.
Efficient investments under the Safety Net provisions Each event which initiates load shedding is quite
will provide mitigation for credible contingencies that different and the amount and type of load shed depends
could otherwise result in outages longer than the Safety on system loading (day of the week, the time of day and
Net targets. Safety Net is defined as effective mitigation season), system synchronous capacity available etc.
of the risk of any low probability/high consequence Similarly, the time required to re-energise and restore
network outages to avoid unexpected customer electricity supply after UFLS is also variable.
hardship and/or significant community or economic
disruption. Safety Net targets for power restoration 6.4. Demand Management
times are prescribed for different locations and energy Ergon Energy Network and Energex have a Demand
loads at risk. Management (DM) Program, which involves working
with our customers and industry partners to reduce
We continue to review the changing state of the demand to maintain system reliability in the short term
network for Safety Net compliance as part of the normal and over the longer term to defer capital projects. Each
network planning process, ensuring that care is taken to year load at risk areas on the network are identified
understand our customers’ needs when considering the through the Distribution Annual Planning Report (DAPR).
competing goals of service quality and reliability against
cost of network.
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This Document is Uncontrolled When PrintedThese areas are analysed for suitability for DM solutions. management plans, network control centre restoration
Where deemed suitable, Target Areas are established, plans and also our geospatial information system. a
and incentives offered to customers for DM solutions. Restoration of supply to these locations is given highest
Contracts are established with customers to provide priority during emergency events to ensure essential
permanent or point in time (e.g. at certain times in services are provided to the community as soon as safely
summer) load reduction. DM solutions can include possible.
energy efficiency, power factor correction, load
curtailment, load shifting and customer embedded 6.6. Emergency Mobile Generation
generation. Details of Target area locations and Mobile standby generators are used to provide
constraint are found on the Ergon Energy Network and emergency response to sub-transmission and
Energex websites. distribution network faults that cannot be rectified by
switching or immediate fault restoration. This assists in
A number of non-network alternative generation restoration of supply in a manner that minimises
contracts exist which provide network support, if customer disruption. The fleet of mobile generators also
needed, over higher risk periods. Broad based DM is also provide flexibility for feeder support during extreme
incentivised across the State. It delivers demand temperature/load events where existing network assets
reductions across the whole network, rather than just in need to be supplemented.
a local load at risk area. These demand reductions
achieved from appliances connected to control load and These generators are also pre-emptively deployed to
Peak Smart air conditioners, which can be called upon locations likely to be isolated during significant flooding
during emergency or extreme peak demand summer or storm damage.
events. Our Ergon Energy Network mobile generator fleet is
The DM Plan 2021-22 highlights the DM capability that approximately 21MVA in total capacity available. The
can be called upon during times of peak network current fleet includes 37 low voltage generators ranging
demand or as part of emergency response. This in size from 60kVA to 1250kVA and five Pegasus
capability is called upon to minimise interruptions from 1250kVA HV injection units. There are currently 6.7MVA
extreme weather conditions. This same capability can committed to network support. The HV injection units
also be called upon to provide network demand comprising of a 1250kVA generator and 1250kVA
response to the Australian Energy Market Operator Pegasus unit are capable of being directly connected to
(AEMO) i.e. lack of reserve events. either the underground or overhead 11kV or 22kV
networks.
6.5. Critical Community Assets
The Energex mobile generator fleet is 23.3 MVA in total
There are a number of locations throughout the network
capacity. The current fleet includes 45 low voltage
where continual electricity supply is considered critical
generators ranging in size from 60kVA to 500 kVA and
to the health and wellbeing of the general community.
five high voltage mobile 1250kVA units. There are
These installations include hospitals, life support
currently 8.25MVA (4 x 500kVA generators and
systems, water supply pumping stations, sewerage
5 x 1250kVA generator) committed to network support.
pumping stations and communications infrastructure.
In addition to our own generation equipment, EQL has
Ergon Energy Network and Energex representatives
arrangements in place to hire low voltage generators to
work collaboratively with local councils and customers
ensure adequate generators for unplanned and planned
to ensure that these locations are known, prioritised and
feeder support.
incorporated into restoration plans. Listings of these
installations are integrated into our disaster
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This Document is Uncontrolled When PrintedWhere flooding has potential to interrupt supply to Hazard specific communications and awareness sessions
critical sites or groups of customers, generators may be are conducted for field employees including appropriate
mobilised on a priority basis as approved by Emergency work practices and vehicle use during natural hazard
Managers (including advice from Disaster Management conditions.
Groups). Where there is a major flood and access to
communities is likely to be inaccessible, generators will 6.9. Preparing Customers
be considered for strategic early deployment. Both Ergon Energy Network and Energex use targeted
awareness campaigns to communicate with customers
Regional plans have been developed to identify and about how to prepare for storm and cyclone season, and
optimise switching points and generator connection how to be safe around fallen powerlines. The ‘Take Care.
points. Permanent connection points for HV generation Stay Line Aware’ media campaign will be used this
are included in our Geospatial Information Systems (GIS) summer across both Ergon Energy Network and Energex
to assist in planning considerations. areas to promote important safety messages, educate
customers about the dangers of fallen powerlines, to be
6.7. Seasonal Outlooks and Forecasts
prepared for storms and cyclones, and where to find
The Bureau of Meteorology (BOM) provide specific
outage information and updates.
seasonal outlooks, rainfall predictions and weather
warnings. These also include other information and Safety advertising is placed in various channels including
analysis sources such as fire weather predictions, flood television, digital, press and social media. It helps
and rainfall forecasts, cyclone outlooks, tsunami reinforce awareness of the dangers of fallen powerlines
warnings, space weather and weather warnings. during storms, staying clear of fallen powerlines and
contacting emergency services, Energex or Ergon Energy
Bushfire season specific outlooks are also provided by
Network to report the danger. Our Safety Champions
The Natural Hazards and Bushfire Cooperative Research
education program in primary schools is a key
Centre (CRC).
component of readiness activities and electrical safety
Specialist weather forecasting arrangements are in place awareness.
to provide a range of services to assist in preparation for
The primary communication channels with our
severe weather events.
customers include direct contact via our National
Access to this type of information enables us to make Contact Centres (including interactive voice recording
informed decisions on the potential impact of the threat (IVR) messages), traditional media (print, radio and
and prepare the necessary organisational response. television), online (Ergon Energy Network and Energex
websites, including Outage Finder tools) and social
Annual pre-storm season briefings are also provided to media (Facebook and Twitter).
key response and operational teams to assist in
understanding the driving factors and potential impacts We also utilise State Government media channels, via
of the impending season. the Crisis Communication Network, and through the
partnership of Queensland Government Departments
6.8. Training and Exercise Management and Agencies.
A suite of training and exercise activities is conducted
annually to ensure employees and response teams
undertake refreshers and understand their roles and
responsibilities.
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This Document is Uncontrolled When Printed7. Response 7.2. Weather Forecasting
EQL engage specialist weather forecasting arrangements
7.1. Intelligence Systems to provide a range of services to assist in preparation for
7.1.1. Internal severe weather events and natural hazards. The data
Ergon Energy Network and Energex use Geographical includes:
Information Systems (GIS) which utilise corporate data
and enable the retrieval of relevant information about • Current wind speed, wind direction,
our electricity assets. This includes the physical location, temperature and humidity conditions
layout of the assets, specification on equipment and the • Historical observations of this weather data
types and lengths of overhead lines and underground • Comments on observed data and weather
network. The GIS system also includes visual layers that patterns specific to our network areas
provides the high bushfire risk areas in South East • A five-day high-resolution forecast of
Queensland, Regional Queensland and current QFES temperature and wind speed
known fires, amongst other natural hazard information. • General forecasts and weather warnings
• Links to satellite and radar information and
7.1.2. External displays, and
There are a variety of online resources, web links and • Longer term climate outlook forecast.
interactive mapping available from external • Forecast weather patterns including heatwaves,
agencies and organisations. Where possible these have storms and lightning levels.
been integrated into our GIS platform or links made • Integration with QFES Sentinel satellite fire
available through a centralised internal Emergency detection
Information Centre. Resources include:
• Bushfire real time and forecast mapping.
• Weather forecasting through the Bureau of
Meteorology including seasonal outlooks and 7.3. Hazard Specific Alerts
information sources, fire weather predictions, Information regarding hazard specific alert systems and
flood / rainfall, cyclone outlooks, tsunami, space
warnings are included in Part C.
weather and weather warnings are available for
analysis 7.4. Emergency Response Levels
• Storm surge and inundation information Ergon Energy Network and Energex will respond to
collected during previous flooding events across
various levels of incidents through a standard fault
Queensland depot areas. This is recorded in the
response and emergency escalation framework. An
internal systems and flood plans. Flood data is
consolidated and incorporated from a variety of initial assessment of potential damage will determine
sources including independent assessments, whether the response is managed operationally or
Queensland State Government agencies and escalated to a Level 2 or Level 3 Emergency
Local Councils and included in restoration and Management structure.
network plans. The Department of Resources,
A Level 1 event response utilises local resources, routine
Mines also provide interactive mapping based
on previous flooding to the public business structures and processes without the need to
• Bushfire real time and forecast mapping to assist escalate to a full emergency framework or additional
in fire response command and control structures.
• Critical community asset locations including A Level 2 event requires escalation and support from an
hospitals, medical centres, water treatment
emergency management structure, framework and
plans and dams.
processes relevant and scalable for the nature and
location of the event.
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This Document is Uncontrolled When PrintedThe Emergency Management Plan (EMP) Distribution 7.6. Isolation for Safety
Network details the framework and processes to be During major storms, flood events, bushfire events or on
applied when preparing for and responding to a Level 3 days where a Total Fire Ban has been declared, Ergon
Emergency event which disrupts the supply and Energy Network or Energex may be directed or be
distribution of electricity or the provision of related requested to isolate sections of the network in the
services to customers and communities. immediate area of the event. These requests may be
For predicted Level 3 events with lead times or advance received from appropriately authorised Officers of Qld
warning, the business will advise of its response status Police Service (QPS) or QFES. There may be instances
utilising phases aligned with Queensland Disaster where Ergon Energy Network and Energex will
Management Arrangements (Alert, Lean Forward, Stand proactively isolate during forecast flood and fire events
Up and Stand Down). When any event is sudden or in the interests of public safety and protection of its
unexpected, the response may move rapidly through the equipment and private property.
relevant phases, while still ensuring that all actions to Ergon Energy Network and Energex will, where practical
establish response teams, response centres, mobilise and within the best interests of the community, conduct
resources and communicate to all stakeholders are a patrol of any isolated overhead mains before re-
completed. energising this equipment. This practice is to ensure that
The response is managed within an escalation process lines have not sustained damage from the event, all
that increases resource capabilities and coordination, faults have been repaired and the network is safe to re-
drawing across regions as required to meet the response energise.
requirements in the impacted area. On completion of the patrol, clearance will be given by
the field supervisor who completed the patrol to allow
7.5. Priority Assets and Restoration Approach
the line to be re-energised once any identified faults
The main priorities immediately following the impact of
have been addressed.
an event is safety of employees and the community,
identifying the number of customers affected, extent of Areas known to succumb to inundation have been
damage, types of customers and availability of response reviewed and identified for potential de-energisation
teams. This information allows review and refinement of before the waters rise to unsafe or inaccessible levels.
resourcing and restoration strategies and plans. Initially This process ensures an increased level of safety for the
making the network safe for staff and the public occurs public, potential reduced damage from water ingress
before restoration activities commence. and improved response times.
Where there are multiple interruptions to the network, Key distribution electrical assets which were impacted
the priority for restoration is to emergency services by previous major flooding the 2011, 2013, 2017 and
including as essential services, hospitals and emergency 2019 flood events in regional cities including
services. Rockhampton, Toowoomba, Bundaberg, Dalby, Fraser
Coast, Townsville and Far North Queensland have been
We continue to enhance our mobile and digital
recorded and identified for consideration in the event of
technology platforms to assist in improving our ability to
or forecast of a flood event. Similar lists are available
respond, analyse damage and perform repairs including
along the South East Queensland River systems including
the capture of near real time intelligence through our
Brisbane, Ipswich, Gympie, Gold Coast, Logan and Albert
Field Force mobility, LiDAR and geospatial mapping
rivers. These flood levels and resultant inundation now
systems. This facilitates rapid damage assessment, make
inform our preparedness and response.
safe activities, and immediate restoration priorities.
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This Document is Uncontrolled When PrintedOur customer teams have identified critical and Life We utilise our local and state-wide media and
Support Customers that will be contacted prior to any community stakeholder relationships to keep the
pre-emptive isolation. Memorandums of Understanding important storm season messages 'top-of-mind'
(MOUs) have also been developed with critical throughout the storm season. Key messages are
infrastructure agencies to ensure communication, delivered through media releases and targeted
disconnection and reconnection protocols are in place. stakeholder engagement to raise community awareness
of weather-related issues, such as cyclone preparation
8. Recovery and electrical safety.
Recovery is the coordinated process to permanently These communications focus on delivering key safety
restore operational capability, the network messages, setting customer expectations regarding
infrastructure or electricity supply to the community. network restoration, and directs customers to the online
This is usually conducted in parallel with the emergency Outage Finder for updates to the National Contact
response and these activities may occur in the Stand Up Centre to report damage and faults.
and Stand Down stages. Follow on recovery activities
can also be triggered when further permanent works 9.1. Event Community Outreach
have been identified to be completed after the During significant events, our Community Outreach
emergency event during planned programs of work. teams are deployed within impacted communities to
provide face-to-face customer engagement focusing on
Disaster recovery requires a collaborative, coordinated,
safety messages, restoration updates, the re-connection
adaptable and scalable approach in which responsibility
process (following inundation/structural damage), as
for delivery is shared between all sectors of the
well as referrals to Ergon Energy Retail for account
community and all levels of government. EQL play a key
services and assistance. We also engage and inform
role in both immediate recovery activities, as well as
customers on social media and the online Outage Finder
working with government agencies on infrastructure
to provide relevant and timely updates.
resilience, business continuity, reliability and community
and customer support. These digital platforms have now become the more
popular information and communication channels for
9. Community Engagement customers.
For over 20 years, both Ergon Energy Network and
9.2. Online Event Storm Centre
Energex have built strong brand recognition as the
Our event-activated online Storm Centre directs
public face of the electricity network to our customers
customers visiting our websites to important
and the primary information broker for electricity supply
information on preparations, what to do during major
outage and restoration information. We have a strong
storms and cyclones, and the general process we follow
and proven reputation of providing effective, timely, and
to restore supply to our customers in impacted areas.
accurate information during significant disruption events
During major events the site is updated regularly with
such as cyclones, floods, storms, bushfires, and peak
the latest information regarding the response and
demand (heatwaves) events.
restoration efforts.
The media and community engagement teams of Ergon
Energy Network and Energex deliver timely, accurate, 10. Safety
and targeted communications to internal and external The safety of personnel and the community is
stakeholders before, during, and after major weather paramount. Ergon Energy Network and Energex
events. employees will not put themselves at risk either prior,
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